there are a number of couponing sites, which identify coupons, and match them to weekly store deals. i.e. moneysavingmom.com passionatepennypincher.com livingrichwithcoupons.com
the 25c coupon would always help you save 25c.
But the way these coupon mavens do it is to max out the coupon. i.e. they wait to use the coupon on a day when tide is buy one get one free and discounted to $5, and on a day when coupons are doubled, and on a day when if you buy $10 worth of laundry products your store gives you $2.50 worth of store credit.
so you buy 4 tides. initial price $10 as they are 2 for $5.
then you use 4 25c coupons, but these double to 50c each, so it is less $2
you are now out of pocket only $8.
then, as your store was runing a store credit when you purchased a face value of $10 worth of laundry products, they credit your $2.50. so you are actually only out of pocket $5.50 $8-$2.50.
you ended up paying only $1.37 per bottle of tide. as compared with the 9.89 regular price, and 8.99 sale price.
Might be worthwhile starting small and trying say $5 or $10 worth of coupon deals as put forth by these sites.
we only do it for those things which we might otherwise use, and are a true cost savings. never more than a handful at a time, because frankly we don't have the space for it.
the reason that you see couponers purchasing vast numbers of sometimes unusable items is because sometimes, coupons or a combination of coupons ends up being a money maker. i.e. the combined discount and store credit makes the product, not only free, but worth cash or credit back.
If I could earn 50c per toothbrush, and I had coupons for 50 toothbrushes, I might grab the lot. I would have "earned" $25.00 which I can then use for anything in that shop. I can donate the toothbrushes to say a shelter, and claim a donation for the face value of the toothbrushes. Win win.
this stuff takes time, planning, attention to detail, but absolutely can be done.
best to you and yours,
F. B.